DUBLIN, Calif. (AP) — Authorities say a 33-year-old inmate was found dead in a single-person jail cell of a San Francisco Bay Area jail.

The East Bay Times reports Alameda County Sheriff's deputies found the man dead Monday at Santa Rita Jail.

The sheriff's office says in a statement a preliminary investigation turned up no signs of trauma or foul play.

Officials say detectives and coroner's investigators are carrying out a full investigation, and that the Alameda County District Attorney's office has been notified.

Results of a planned autopsy will be released when complete. The man was not identified, pending notification of family.

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Information from: East Bay Times, http://www.eastbaytimes.com